import {mapGetters} from 'vuex'
export default {
   computed:{
    ...mapGetters('m_cart',['total']) 
   },
   watch:{
     total(){
       this.setBadge();
     }
   },
   onShow(){
      this.setBadge()
   },
   methods:{
     setBadge(){
       uni.setTabBarBadge({
         index:2,
         text:this.total + ''
       })
     }
   }
}